Test 1 Review

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Which is relatively​ better: a score of 7373 on a psychology test or a score of 4242 on an economics​ test? Scores on the psychology test have a mean of 8888 and a standard deviation of 99. Scores on the economics test have a mean of 6565 and a standard deviation of 88.

A. The economicseconomics test score is relatively better because its z score is greater than the z score for the psychologypsychology test score. B. The psychologypsychology test score is relatively better because its z score is greater than the z score for the economicseconomics test score. C. The psychologypsychology test score is relatively better because its z score is less than the z score for the economicseconomics test score. D. The economicseconomics test score is relatively better because its z score is less than the z score for the psychologypsychology test score.

If your score on your next statistics test is converted to a z​ score, which of these z scores would you​ prefer: minus−​2.00, minus−​1.00, ​0, 1.00,​ 2.00? Why?

A. The z score of 1.00 is most preferable because it is 1.00 standard deviation above the mean and would correspond to an above average test score. B. The z score of minus−2.00 is most preferable because it is 2.00 standard deviations below the mean and would correspond to the highest of the five different possible test scores. C. The z score of 0 is most preferable because it corresponds to a test score equal to the mean. D. The z score of minus−1.00 is most preferable because it is 1.00 standard deviation below the mean and would correspond to an above average test score. E. The z score of 2.00 is most preferable because it is 2.00 standard deviations above the mean and would correspond to the highest of the five different possible test scores.

In an​ editorial, the Poughkeepsie Journal printed this​ statement: "The median priceminus−the price exactly in between the highest and lowestminus−​..." Does this statement correctly describe the​ median? Why or why​ not?

A.No. It describes the​ midrange, not the median. B.Yes. It correctly describes the median. C.No. It describes the​ mode, not the median. D.No. It describes the​ mean, not the median.


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